Dr. Maureen K. O'Riley is the tough as nails Chief of Surgery. Dr. O'Riley has clawed and kicked her way to the top of the pHreedom General food chain and she will not hesitate to step on anyone who tries to get in her way...no matter how talented, or how much they deserve it. Dr. O'Riley is single and has no attachments in her life. She is devoid of emotion. Yikes!

Dr. O'Riley is played by returning star, Patti Foults. Patti previously played a Featured Extra in Season 8: Unexplained. Patti comes to us from her reality show hit, Wife Swap.